A thing is when 2 people like each other, and they're "seeing each other" and no one else. And if they do shit together no one will be called a slut or anything cause they have a thing... the urge of dating but not official

An action, fashion style, philosophy, musical genre, or other popularly recognized subsection of popular culture. Normally used in surprise at it's existence. Becomes official when a wikipedia article is created for it.